At the end of World War II, a Royal Navy submarine on routine patrol strikes and detonates a mine. The subsequent explosion sinks the submarine, killing most of its crew. Frantic efforts the... Read allAt the end of World War II, a Royal Navy submarine on routine patrol strikes and detonates a mine. The subsequent explosion sinks the submarine, killing most of its crew. Frantic efforts then take place to rescue those remaining left alive.At the end of World War II, a Royal Navy submarine on routine patrol strikes and detonates a mine. The subsequent explosion sinks the submarine, killing most of its crew. Frantic efforts then take place to rescue those remaining left alive.